Water treatment unit



FIG. 1 is a side elevational illustration of a water treatment unit according to my invention,

FIG. 2 is a side elevational illustration from the side opposite to FIG. 1,

FIG. 3 is an end elevational illustration of one end thereof,

FIG. 4 is an end elevational illustration of the other end thereof,

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a water treatment unit, as shown and described. 